I have the same issue as the original forum posting...so the expert advice is, in TurboTax, to fill in the boxes of the 1099-B Form 8949 that the brokerage firm did not provide information for if the taxpayer has the information? I want to do a double check since I guess I would have thought that TurboTax would have had a way to enter the taxpayer's information but leave the information inputs on the Form 8949 as the brokerage firm had prepared it.
